export default  {
	"title": '操作系统_在线2',
	"testId": '149476',
	"praxiseList": [
		{
			"id": 219694,
			"title": "下述作业调度算法中, (    )调度算法与作业的估计运行时间有关。",
			"options": "[\"先来先服务\",\"短作业优先\",\"均衡\",\"时间片轮转\"]",
			"answer": "2",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:08",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "2"
		},
		{
			"id": 219695,
			"title": "下列关于操作系统的叙述,正确的是",
			"options": "[\"操作系统是源程序开发系统\",\"操作系统用于执行用户键盘操作\",\"操作系统是系统软件的核心\",\"操作系统可以编译高级语言程序\"]",
			"answer": "3",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:08",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "3"
		},
		{
			"id": 219696,
			"title": "Windows XP是(     )位操作系统。",
			"options": "[\"32\",\"64\",\"0.8\",\"16\"]",
			"answer": "1",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:08",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "1"
		},
		{
			"id": 219697,
			"title": "(    )优先权是在创建进程时确定的，确定之后在整个进程运行期间不再改变。",
			"options": "[\"先来先服务\",\"静态\",\"动态\",\"短作业\"]",
			"answer": "2",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:08",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "2"
		},
		{
			"id": 219698,
			"title": "采用（  ）不会产生内部碎片",
			"options": "[\"分页存储管理\",\"分段存储管理\",\"固定分区存储管理\",\"段页式存储管理\"]",
			"answer": "2",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:08",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "2"
		},
		{
			"id": 219699,
			"title": "逻辑文件是由(     )确定的文件组织形式（即文件结构）。",
			"options": "[\"外部设备\",\"虚拟存储\",\"绝对地址空间\",\"用户按对信息处理要求\"]",
			"answer": "4",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:08",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "4"
		},
		{
			"id": 219700,
			"title": "逻辑文件存放在磁带上应组织成",
			"options": "[\"索引文许\",\"直接文件\",\"顺序文件\",\"链接文件\"]",
			"answer": "3",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:08",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "3"
		},
		{
			"id": 219701,
			"title": "通道是一种",
			"options": "[\"I\\/O断口\",\"共享文件\",\"I\\/O专用处理器\",\"数据通道\"]",
			"answer": "3",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:08",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "3"
		},
		{
			"id": 219702,
			"title": "通道又称I/O处理机，它用于实现（  ）之间的信息传输。",
			"options": "[\"主存与外设\",\"CPU与外设\",\"主存与外存\",\"CPU与外存\"]",
			"answer": "1",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:08",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "1"
		},
		{
			"id": 219703,
			"title": "虚拟存储器实际容量受（  ）限制",
			"options": "[\"物理主存的大小\",\"计算机的地址结构\",\"磁盘容量\",\"数据存放的绝对地址\"]",
			"answer": "2",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:08",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "2"
		},
		{
			"id": 219704,
			"title": "缓冲技术中的缓冲池在（  ）中",
			"options": "[\"外存\",\"内存\",\"ROM\",\"寄存器\"]",
			"answer": "1",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:08",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "1"
		},
		{
			"id": 219705,
			"title": "系统“抖动”现象的发生是由（  ）引起的。",
			"options": "[\"交换的信息量过大\",\"置换算法选择不当\",\"内存容量不足\",\"请求分页管理方案\"]",
			"answer": "2",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:08",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "2"
		},
		{
			"id": 219706,
			"title": "段页式存储管理中，地址映射表是",
			"options": "[\"每个作业或进程一张段表，两张页表\",\"每个作业或进程的每个段一张段表，一张页表\",\"每个作业或进程一张段表，每个段一张页表\",\"每个作业一张页表，每个段一张段表\"]",
			"answer": "3",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:08",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "3"
		},
		{
			"id": 219707,
			"title": "文件系统中用（    ）管理文件",
			"options": "[\"作业控制块\",\"外页表\",\"目录\",\"软硬件结合的方法\"]",
			"answer": "3",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:08",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "3"
		},
		{
			"id": 219708,
			"title": "操作系统处理缺页中断时，选择一种好的调度算法对主存和辅存中的信息进行高效调度尽可能地避免",
			"options": "[\"碎片\",\"CPU空闲\",\"多重中断\",\"抖动\"]",
			"answer": "4",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:08",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "4"
		},
		{
			"id": 219709,
			"title": "按（  ）分类可将设备分为块设备和字符设备。",
			"options": "[\"从属关系\",\"操作特性\",\"共享属性\",\"信息交换单位\"]",
			"answer": "4",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:08",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "4"
		},
		{
			"id": 219710,
			"title": "很好地解决了“零头”问题的存储管理方法是",
			"options": "[\"分页存储管理方式\",\"分段存储管理方式\",\"多重分区管理\",\"可变式分区管理\"]",
			"answer": "1",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:08",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "1"
		},
		{
			"id": 219711,
			"title": "存储设备与存储器之间进行信息交换的物理单位是",
			"options": "[\"卷\",\"块\",\"文件\",\"记录\"]",
			"answer": "2",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:08",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "2"
		},
		{
			"id": 219712,
			"title": "如果I/O设备与存储设备进行数据交换不经过CPU来完成，这种数据交换方式是",
			"options": "[\"中断方式\",\"无条件存取方式\",\"DMA方式\",\"程序查询方式\"]",
			"answer": "3",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:08",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "3"
		},
		{
			"id": 219713,
			"title": "在采用SPOOLING技术的系统中，用户的打印数据首先被送到",
			"options": "[\"打印机\",\"磁盘的输入井\",\"磁盘的输出井\",\"终端\"]",
			"answer": "3",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:08",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "3"
		},
		{
			"id": 219714,
			"title": "下列属于网络操作系统特性的是",
			"options": "[\"多用户、单任务\",\"运行在服务器和客户机上\",\"拥有自己的通信协议软件\",\"都是实时操作系统\"]",
			"answer": "[2,3]",
			"type": "muti",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:08",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "[2,3]"
		},
		{
			"id": 219715,
			"title": "顺序结构文件的特点是",
			"options": "[\"磁盘存储空间的利用率不高\",\"便于用户户扩充文件\",\"存储空间不必连续\",\"便于随机存取\",\"存取信息速度快\"]",
			"answer": "[1,5]",
			"type": "muti",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:08",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "[1,5]"
		},
		{
			"id": 219716,
			"title": "文件的保密是指防止他人窃取文件，采用（     ）方法实现文件保密。",
			"options": "[\"定时转储\",\"建立副本\",\"为文件设置口令\",\"规定文件使用权限\",\"将文件译成密文\"]",
			"answer": "[3,5]",
			"type": "muti",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:08",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "[3,5]"
		},
		{
			"id": 219717,
			"title": "在 Windows 环境下,假设已经选定文件,以下文件移动操作的叙述中,正确的有",
			"options": "[\"直接拖至不同驱动器的图标上\",\"用鼠标右键拖至同一驱动器的另一子文件夹上，从快捷菜单中选择“移动到当前位置”\",\"用鼠标左键拖至同一驱动器的另一子文件夹上\",\"按住CTRL键，拖至不同驱动器的图标上\"]",
			"answer": "[2,3]",
			"type": "muti",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:08",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "[2,3]"
		},
		{
			"id": 219718,
			"title": "关于一级目录结构说法正确的是",
			"options": "[\"一级目录结构是最简单的目录结构\",\"所有的文件都登记在同一个文件目录中\",\"一级目录结构简单，管理复杂\",\"一级目录不支持文件重名\",\"容易实现文件共享\"]",
			"answer": "[1,2,4]",
			"type": "muti",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:08",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "[1,2,4]"
		},
		{
			"id": 219719,
			"title": "逻辑文件可以有_________这几种形式。",
			"options": "[\"目录文件\",\"永久文件\",\"流式文件\",\"文本文件\",\"记录式文件\"]",
			"answer": "[3,5]",
			"type": "muti",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:08",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "[3,5]"
		},
		{
			"id": 219720,
			"title": "通常所说的文件,要永久地保存,应该存放在_________介质上。",
			"options": "[\"硬盘\",\"软盘\",\"CD_ROM\",\"磁带\",\"高速缓存\"]",
			"answer": "[1,2,3,4]",
			"type": "muti",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:08",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "[1,2,3,4]"
		},
		{
			"id": 219721,
			"title": "设计多道批处理系统时,要考虑的因素有_________。",
			"options": "[\"交互性\",\"及时性\",\"系统效率\",\"吞吐量\",\"实时性\"]",
			"answer": "[3,4]",
			"type": "muti",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:08",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "[3,4]"
		},
		{
			"id": 219722,
			"title": "若中央处理机处于“目态”,可以执行的指令有_________。",
			"options": "[\"读系统时钟\",\"写系统时钟\",\"读用户内存自身数据\",\"写用户内存自身数据\",\"清除整个内存\"]",
			"answer": "[1,3,4]",
			"type": "muti",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:08",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "[1,3,4]"
		},
		{
			"id": 219723,
			"title": "磁盘上空闲块的管理方法,通常可采用_________。",
			"options": "[\"位示图法\",\"逻辑文件法\",\"物理文件法\",\"空闲块链接法\",\"索引文件法\"]",
			"answer": "[1,4]",
			"type": "muti",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:08",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "[1,4]"
		},
		{
			"id": 219724,
			"title": "当检测出发生死锁时，可以通过撤消一个进程解除死锁",
			"options": "",
			"answer": "-1",
			"type": "charge",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:08",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "-1"
		},
		{
			"id": 219725,
			"title": "开始菜单包含了WINXP的全部功能",
			"options": "",
			"answer": "-1",
			"type": "charge",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:08",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "-1"
		},
		{
			"id": 219726,
			"title": "任务栏可显示运行窗口的标题、时间信息、快速启动、文件夹图标、快捷方式图标等",
			"options": "",
			"answer": "1",
			"type": "charge",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:08",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "1"
		},
		{
			"id": 219727,
			"title": "以优先级为基础的进程调度算法可以保证在任何时候正在运行的进程总是非等待状态下诸进程中优先级最高的进程",
			"options": "",
			"answer": "-1",
			"type": "charge",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:08",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "-1"
		},
		{
			"id": 219728,
			"title": "DOS命令分为外部命令和内部命令。",
			"options": "",
			"answer": "1",
			"type": "charge",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:08",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "1"
		},
		{
			"id": 219729,
			"title": "通过任何手段都无法实现计算机系统资源之间的互换. (   )",
			"options": "",
			"answer": "-1",
			"type": "charge",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:08",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "-1"
		},
		{
			"id": 219730,
			"title": "进程获得处理机而运行是通过申请而得到的. (   )",
			"options": "",
			"answer": "-1",
			"type": "charge",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:08",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "-1"
		},
		{
			"id": 219731,
			"title": "进程申请CPU得不到满足时, 其状态变为等待态. (   )",
			"options": "",
			"answer": "-1",
			"type": "charge",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:08",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "-1"
		},
		{
			"id": 219732,
			"title": "进程控制块中的所有信息必须常驻内存. (   )",
			"options": "",
			"answer": "-1",
			"type": "charge",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:08",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "-1"
		},
		{
			"id": 219733,
			"title": "进程在运行中, 可以自行修改自己的进程控制块. (   )",
			"options": "",
			"answer": "-1",
			"type": "charge",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-06-18 10:00:08",
			"last_time": null,
			"iscorrect": 1,
			"user_answer": "-1"
		}
	]
}